My parent's have a @300' rohn in the back yard (cell company) the guy
anchors are 25' deep and 5' across (round) with a piece of 12"x8"x1/2"
I-beam Approx 15' long with 3' sticking out of the concrete above ground.
The rebar in the in the anchor is 1" welded at every junction and welded to
the I-beam. the rebar protrudes nowhere from the concrete. Now I am pretty
sure that rohn (who designed tower installation) knew what was involved when
they welded the rebar "basket" in the warehouse, but the galvanized I-beam
was attached in the field. I know I watched them.
I think that it is a matter of knowing your material and knowing (really
knowing) what you are doing.
R
----- Original Message -----
From: "Mowery Joseph D DLVA" <MoweryJD@NSWC.NAVY.MIL>
To: <towertalk@contesting.com>
Sent: Friday, June 20, 2003 12:13 PM
Subject: RE: [TowerTalk] QST article on how to put up a tower
> All,
> Rebar should not be welded at any time. This will affect the
> material properties of the rebar and will invalidate any calculations for
> the structural integrity of the rebar cage. Rebar must be tied with metal
> wire to specific twists and length. If you want a ground at your tower.
> Buy some 8ft ground rods and drive them in. Or, install ground radials.
> But, please don't weld the cage. Your inspector will thank you and you
will
> save money by not building it again.
>
> v/r,
> Joe
> AG4BW
>
>
>
> -----Original Message-----
> From: Jim [mailto:w7ry@centurytel.net]
> Sent: Friday, June 20, 2003 1:05 PM
> To: towertalk@contesting.com
> Subject: Re: [TowerTalk] QST article on how to put up a tower
>
>
> If your going to use the cage for a Ufer ground, then it should be welded.
>
> If your not, then tied would be fine. The 100,000's of feet of rebar in a
> bridge is tied.
>
> 73
> Jim W7RY
> ----- Original Message -----
> From: Paul Playford
> To: David L. Thompson ; towertalk@contesting.com
> Sent: Thursday, June 19, 2003 7:56 PM
> Subject: Re: [TowerTalk] QST article on how to put up a tower
>
>
> I am under the impression that the rebar cage should be tied, not
welded.
>
> Comments?
>
> de Paul, W8AEF
>
>
> ----- Original Message -----
> From: "David L. Thompson" <thompson@mindspring.com>
> To: <towertalk@contesting.com>
> Sent: Friday, June 20, 2003 1:04 AM
> Subject: Re: [TowerTalk] QST article on how to put up a tower
>
>
> > The article was quite good except for pulling the tower up by a rope.
It
> > looks like a US Tower and the easier way is to use the tower raising
> > fixture. They sell one for the smaller towers and one for the HD
> towers.
> I
> > could not use my 71 footer without the fixture.
> > 73 Dave K4JRB
> >
> > > The July QST has an article by WB6WUW on how to put up a
> self-supporting
> > > tower. It begins on p. 33.
> > >
> > > Rob Atkinson
> > > K5UJ
> >
>
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
> Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with
any
> questions and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
>http://lists.contesting.com/mailman/listinfo/towertalk
>
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
> Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with
any
> questions and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
>http://lists.contesting.com/mailman/listinfo/towertalk
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
>http://lists.contesting.com/mailman/listinfo/towertalk